There's a door ahead. Based on its appearance or its context -- usually standing there with no actual wall around it -- you just know something amazing and dangerous lies on the other side. This isn't just a physical trope of a door being there, but a narrative device. Because the door is so obviously doomful, the characters recognize that going through is a big decision. Compare Cool Gate. Not to be confused with Doom Doors. Examples of Door of Doom include: